AVONDALE, Ariz.(AP) — Kyle Larson knew he wasn’t going to catch Denny Hamlin in the final laps on Sunday, not without the sort of help that only a caution flag can bring.

Larson got his lucky break.

Hamlin only got heartbreak.

Larson is now a two-time NASCAR champion after denying Hamlin what would have been his first career title when a late caution at Phoenix Raceway sent the championship-deciding finale into overtime.

Without that caution, which came with three laps to run, Hamlin had it locked up and was ready to finally shed the label of greatest NASCAR driver to never win a championship. But fellow title contender William Byron got a flat tire and hit the wall to bring out the caution, and a few minutes later, it was over.

“Just unbelievable,” Larson said. “I cannot believe it.”

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